In this study, microbial fuel cells (MFCs) were explored to promote the nitrogen removal performance of combined anaerobic ammonium oxidation (anammox) and Fe-C micro-electrolysis (CAE) systems. The average total nitrogen (TN) removal efficiency of the modified MFC system was 85.00%, while that of the anammox system was 62.16%. Additionally, the effective operation time of this system increased from six (CAE system alone) to over 50 days, significantly promoting TN removal. The enhanced performance could be attributed to the electron transferred from the anode to the cathode, which aided in reducing nitrate/nitrite in denitrification. The H⁺ released through the proton exchange membrane caused a decrease in the pH, facilitating Fe corrosion. The pyrolyzed waste tire used as the cathode could immobilize microorganisms, enhance electron transport, and produce a natural Fe-C micro-electrolysis system. According to the microbial community analysis, Candidatus kuenenia was the major genus involved in the anammox process. Furthermore, the SM1A02 genus exhibited the highest abundance and was enriched the fastest, and could be a novel potential strain that aids the anammox process.

在这项研究中，探索了微生物燃料电池（MFCs）来提高厌氧铵氧化（anammox）和Fe-C微电解（CAE）组合系统的脱氮性能。改进的MFC系统的平均总氮（TN）去除效率为85.00％，而厌氧氨氧化系统的平均总氮去除率为62.16％。此外，该系统的有效运行时间从六天（仅CAE系统）增加到50天以上，从而显着促进了TN的去除。增强的性能可以归因于电子从阳极转移到阴极，这有助于减少反硝化过程中的硝酸盐/亚硝酸盐。H ⁺通过质子交换膜释放的物质导致pH值降低，从而促进了铁的腐蚀。用作阴极的热解废轮胎可固定微生物，增强电子传输，并产生天然的Fe-C微电解系统。根据微生物群落分析，黑线念珠菌是厌氧氨氧化过程中的主要属。此外，SM1A02属显示最高的丰度和最快的富集，并且可能是有助于厌氧氨氧化过程的新型潜在菌株。